Battery charger



FIG. 1 is a front perspective view of the battery charger;

FIG. 2 is a top plan view of the battery charger;

FIG. 3 is a left side view of the battery charger;

FIG. 4 is a rear view of the battery charger;

FIG. 5 is a front view of the battery charger;

FIG. 6 is a right side view of the battery charger; and,

FIG. 7 is a bottom plan view of the battery charger. 

CLAIM The ornamental design of a battery charger, as shown and described. 